This is an authentic ROBERTO COIN 18K Yellow Gold Diamond New Barocco Square Ring 54 6.75. The ring is crafted of 18 karat yellow gold and features a cushion shaped motif pave-set with round brilliant cut diamonds, approximately .16 total carat weight. The ring also features the signature synthetic ruby on the inside. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.